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learning to use MultiSim

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ALMIGHTY TECH said:
u can lock the tool bar. right click on tool bar and u will see the lock bar option.. just check on..
Click to expand...

Hi A. Tech: It didn't work for me. I don't get lock toolbar option.

alexan_e said:
I would be surprised if the oscilloscope showed anything different, you have connected the input to gnd...
Click to expand...

Hi Alex: I have attached the MS10 circuit drawing. I don't know how to connect the circuit to CH1 of the o-scope. In the lab I have seen they have a single wire probe to connect to CH1 or CH2. Please let me know what to do.
 

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  • Circuit2.rar
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Here you have, I also add diode parallel to the LED. So now you can increase the input voltage.
 

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  • Circuit2x.rar
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Last edited:

connectors 1,2,3,4 are the four inputs of the oscilloscope, connect them to the signal you want to see

Alex
 

jony130 said:
Here you have, I also add diode parallel to the LED. So now you can increase the input voltage.
Click to expand...

Jony, many thanks. It is very nice of you but unfortunately MS11's files don't open on MS10. Could you please send me a screenshot?

alexan_e said:
connectors 1,2,3,4 are the four inputs of the oscilloscope, connect them to the signal you want to see
Click to expand...

Thanks, Alex. Aren't 1, 2, 3, 4 fours channels - two wires per channel? I have attached a screenshot. Please have a look to see if it's okay. I think it's not right.
 

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No the four inputs are four independent channel inputs all referenced to the gnd, if you want to see a differential signal there is a math function between channel 1 and 2.

Alex
 

How do I cross two wires without making a junction between them?

Thank for the screenshot, Jony. Could you please correct the connection to the o-scope of the attached circuit? For some reason I found the circuit in your screenshot little confusing?

Regards
PG
 

What confuse you in the diagram??
The CH1 measure voltage between V1 and GND and CH2 measure voltage across the diodes.
 

I add the file to multisim10
 

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  • Circuit2a.rar
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jony130 said:
What confuse you in the diagram??
The CH1 measure voltage between V1 and GND and CH2 measure voltage across the diodes.
Click to expand...

Thank you, Jony. Are you referring to the circuit which you added to MS10? If that's the case, then I think you wanted to say CH2 measures voltage between V1 and GRN (in other words, across R1), and CH1 measures voltage across the diode.

How do I cross two wires without making a junction between them?

Best wishes
PG
 
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PG1995 said:
Thank you, Jony. Are you referring to the circuit which you added to MS10? If that's the case, then I think you wanted to say CH2 measures voltage between V1 and GRN (in other words, across R1), and CH1 measures voltage across the diode.
Click to expand...
No, CH2 measure voltage between V1 (node 4) and GND so we are measuring voltage across the AC voltage source.
In the simulation using that scope it is impassible to measure in the same time the voltage across R1 and voltage across the diode.
Becaues we have only one GND terminal in the scope.

PG1995 said:
How do I cross two wires without making a junction between them?
Click to expand...
When you you draw the wire simply don't click the mouse when two wires crossed.
 

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jony130 said:
No, CH2 measure voltage between V1 (node 4) and GND so we are measuring voltage across the AC voltage source.
In the simulation using that scope it is impassible to measure in the same time the voltage across R1 and voltage across the diode.
Becaues we have only one GND terminal in the scope.


When you you draw the wire simply don't click the mouse when two wires crossed.
Click to expand...

Thank you, Jony.. I have been learning a lot from you. This is the truth I don't like this technical stuff but having you and others members there makes it somewhat interesting...

1: We can use CH3 to measure voltage across R1. Can't we?

2: I also have UItiboard software along with MultiSim. What is it used for?

3: I don't think we use o-scope this way in the lab (at least I haven't seen it being used that way). Please see the attached diagrams to see how I have seen it used. Nothing is attached to the GRND terminal on the o-scope.

The o-scope which I have seen being used:
https://img8.imageshack.us/img8/5408/oscillo.jpg
 

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  • oscope probe.jpg
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You can still get the voltage across R1 using channel 1 and 2 while the oscilloscope gnd is still in connected to 0 gnd.
Connect each channel input (1 and 2) to one side of the resistor, set channel 1 and 2 to the same v/div and click math button (found between the yellow and blue channel buttons), then select from the screen buttons to subtract the two channel voltages (1-2 or 2-1 dependind on how trey are connected).
The resulting trace will be in red, you can turn off the yellow and blue traces (channels) and leave only the red one.

Alex
 
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alexan_e said:
You can still get the voltage across R1 using channel 1 and 2 while the oscilloscope gnd is still in connected to 0 gnd.
Connect each channel input (1 and 2) to one side of the resistor, set channel 1 and 2 to the same v/div and click math button (found between the yellow and blue channel buttons), then select from the screen buttons to subtract the two channel voltages (1-2 or 2-1 dependind on how trey are connected).
The resulting trace will be in red, you can turn off the yellow and blue traces (channels) and leave only the red one.
Click to expand...
1: We can use CH3 to measure voltage across R1. Can't we?
Click to expand...

In real life we can but in simulation we need to use CH4 too, and measure differential voltage as alexan_e described.


2: I also have UItiboard software along with MultiSim. What is it used for?
Click to expand...
You can use this software for PCB design.

3: I don't think we use o-scope this way in the lab (at least I haven't seen it being used that way). Please see the attached diagrams to see how I have seen it used. Nothing is attached to the GRND terminal on the o-scope.

The o-scope which I have seen being used:
https://img8.imageshack.us/img8/5408/oscillo.jpg
Click to expand...
But the GRND cable is connect to the gnd.
And in real life we have a scope and all probes for each channel has its own ground cable.
Bot we don't have this in multisim
 

Thanks a lot, Alex, Jony.

Could you please send me a simple PCB file which I can experiment with in UItiboard? Thank you.

EDIT: Using MS10.
 

Draw your own diagram in multisim then use Transfer---->transfer to UItiboard
 

you can see the attachment.
 

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  • bacup.rar
    388 KB · Views: 84

Thank you, Jony, A. Tech.

1: Does MS10 have center-tapped transformer as one of its virtual component? How do I get it? Please let me know.

2: Please have a look on this video: YouTube - ‪transformerus.avi‬‏

What is a bus?

There are two types of transformers there in the menu: Transformer, Non-linear transformer. As you see both types of transformer have many sub-types. What are these sub-types. By the way, I think the type "transformer" is a center-tapped transformer.

Thanks.
 
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PG1995 said:
Thank you, Jony, A. Tech.

1: Does MS10 have center-tapped transformer as one of its virtual component? How do I get it? Please let me know.
There are two types of transformers there in the menu: Transformer, Non-linear transformer. As you see both types of transformer have many sub-types. What are these sub-types. By the way, I think the type "transformer" is a center-tapped transformer.
Click to expand...
If you want to use the transformer, I recommend you this type
Basic---->basic_virtual--->TS_Virtual
And for now forget about the other transformers types.
Some day you will know the difference.


PG1995 said:
2: Please have a look on this video: YouTube - ‪transformerus.avi‬‏

What is a bus?
Click to expand...
Bus (computing) - Wikipedia, the free encyclopedia
YouTube - ‪Multisim How to Use a Bus‬‏
**broken link removed**
 

jony130 said:
If you want to use the transformer, I recommend you this type
Basic---->basic_virtual--->TS_Virtual
And for now forget about the other transformers types.
Some day you will know the difference.
Click to expand...

Thank you. Please have a look on the attached diagram. Do you think it's center-tapped transformer? It looks like one.
 

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  • transformerdddd.png
    transformerdddd.png
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